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blkcg: fix blkg_alloc() failure path
[linux-2.6.git] / drivers / infiniband / core / verbs.c
blob30f199e8579f4c9d6ea6885093c93c95b35c6c62
1 /*
2 * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
3 * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
4 * Copyright (c) 2004 Intel Corporation. All rights reserved.
5 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
6 * Copyright (c) 2004 Voltaire Corporation. All rights reserved.
7 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
8 * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
9 *
10 * This software is available to you under a choice of one of two
11 * licenses. You may choose to be licensed under the terms of the GNU
12 * General Public License (GPL) Version 2, available from the file
13 * COPYING in the main directory of this source tree, or the
14 * OpenIB.org BSD license below:
15 *
16 * Redistribution and use in source and binary forms, with or
17 * without modification, are permitted provided that the following
18 * conditions are met:
19 *
20 * - Redistributions of source code must retain the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer.
23 *
24 * - Redistributions in binary form must reproduce the above
25 * copyright notice, this list of conditions and the following
26 * disclaimer in the documentation and/or other materials
27 * provided with the distribution.
28 *
29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
30 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
32 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
33 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
34 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
35 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 * SOFTWARE.
37 */
38
39 #include <linux/errno.h>
40 #include <linux/err.h>
41 #include <linux/export.h>
42 #include <linux/string.h>
43 #include <linux/slab.h>
44
45 #include <rdma/ib_verbs.h>
46 #include <rdma/ib_cache.h>
47
48 int ib_rate_to_mult(enum ib_rate rate)
49 {
50 switch (rate) {
51 case IB_RATE_2_5_GBPS: return 1;
52 case IB_RATE_5_GBPS: return 2;
53 case IB_RATE_10_GBPS: return 4;
54 case IB_RATE_20_GBPS: return 8;
55 case IB_RATE_30_GBPS: return 12;
56 case IB_RATE_40_GBPS: return 16;
57 case IB_RATE_60_GBPS: return 24;
58 case IB_RATE_80_GBPS: return 32;
59 case IB_RATE_120_GBPS: return 48;
60 default: return -1;
61 }
62 }
63 EXPORT_SYMBOL(ib_rate_to_mult);
64
65 enum ib_rate mult_to_ib_rate(int mult)
66 {
67 switch (mult) {
68 case 1: return IB_RATE_2_5_GBPS;
69 case 2: return IB_RATE_5_GBPS;
70 case 4: return IB_RATE_10_GBPS;
71 case 8: return IB_RATE_20_GBPS;
72 case 12: return IB_RATE_30_GBPS;
73 case 16: return IB_RATE_40_GBPS;
74 case 24: return IB_RATE_60_GBPS;
75 case 32: return IB_RATE_80_GBPS;
76 case 48: return IB_RATE_120_GBPS;
77 default: return IB_RATE_PORT_CURRENT;
78 }
79 }
80 EXPORT_SYMBOL(mult_to_ib_rate);
81
82 int ib_rate_to_mbps(enum ib_rate rate)
83 {
84 switch (rate) {
85 case IB_RATE_2_5_GBPS: return 2500;
86 case IB_RATE_5_GBPS: return 5000;
87 case IB_RATE_10_GBPS: return 10000;
88 case IB_RATE_20_GBPS: return 20000;
89 case IB_RATE_30_GBPS: return 30000;
90 case IB_RATE_40_GBPS: return 40000;
91 case IB_RATE_60_GBPS: return 60000;
92 case IB_RATE_80_GBPS: return 80000;
93 case IB_RATE_120_GBPS: return 120000;
94 case IB_RATE_14_GBPS: return 14062;
95 case IB_RATE_56_GBPS: return 56250;
96 case IB_RATE_112_GBPS: return 112500;
97 case IB_RATE_168_GBPS: return 168750;
98 case IB_RATE_25_GBPS: return 25781;
99 case IB_RATE_100_GBPS: return 103125;
100 case IB_RATE_200_GBPS: return 206250;
101 case IB_RATE_300_GBPS: return 309375;
102 default: return -1;
103 }
104 }
105 EXPORT_SYMBOL(ib_rate_to_mbps);
106
107 enum rdma_transport_type
108 rdma_node_get_transport(enum rdma_node_type node_type)
109 {
110 switch (node_type) {
111 case RDMA_NODE_IB_CA:
112 case RDMA_NODE_IB_SWITCH:
113 case RDMA_NODE_IB_ROUTER:
114 return RDMA_TRANSPORT_IB;
115 case RDMA_NODE_RNIC:
116 return RDMA_TRANSPORT_IWARP;
117 default:
118 BUG();
119 return 0;
120 }
121 }
122 EXPORT_SYMBOL(rdma_node_get_transport);
123
124 enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
125 {
126 if (device->get_link_layer)
127 return device->get_link_layer(device, port_num);
128
129 switch (rdma_node_get_transport(device->node_type)) {
130 case RDMA_TRANSPORT_IB:
131 return IB_LINK_LAYER_INFINIBAND;
132 case RDMA_TRANSPORT_IWARP:
133 return IB_LINK_LAYER_ETHERNET;
134 default:
135 return IB_LINK_LAYER_UNSPECIFIED;
136 }
137 }
138 EXPORT_SYMBOL(rdma_port_get_link_layer);
139
140 /* Protection domains */
141
142 struct ib_pd *ib_alloc_pd(struct ib_device *device)
143 {
144 struct ib_pd *pd;
145
146 pd = device->alloc_pd(device, NULL, NULL);
147
148 if (!IS_ERR(pd)) {
149 pd->device = device;
150 pd->uobject = NULL;
151 atomic_set(&pd->usecnt, 0);
152 }
153
154 return pd;
155 }
156 EXPORT_SYMBOL(ib_alloc_pd);
157
158 int ib_dealloc_pd(struct ib_pd *pd)
159 {
160 if (atomic_read(&pd->usecnt))
161 return -EBUSY;
162
163 return pd->device->dealloc_pd(pd);
164 }
165 EXPORT_SYMBOL(ib_dealloc_pd);
166
167 /* Address handles */
168
169 struct ib_ah *ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
170 {
171 struct ib_ah *ah;
172
173 ah = pd->device->create_ah(pd, ah_attr);
174
175 if (!IS_ERR(ah)) {
176 ah->device = pd->device;
177 ah->pd = pd;
178 ah->uobject = NULL;
179 atomic_inc(&pd->usecnt);
180 }
181
182 return ah;
183 }
184 EXPORT_SYMBOL(ib_create_ah);
185
186 int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
187 struct ib_grh *grh, struct ib_ah_attr *ah_attr)
188 {
189 u32 flow_class;
190 u16 gid_index;
191 int ret;
192
193 memset(ah_attr, 0, sizeof *ah_attr);
194 ah_attr->dlid = wc->slid;
195 ah_attr->sl = wc->sl;
196 ah_attr->src_path_bits = wc->dlid_path_bits;
197 ah_attr->port_num = port_num;
198
199 if (wc->wc_flags & IB_WC_GRH) {
200 ah_attr->ah_flags = IB_AH_GRH;
201 ah_attr->grh.dgid = grh->sgid;
202
203 ret = ib_find_cached_gid(device, &grh->dgid, &port_num,
204 &gid_index);
205 if (ret)
206 return ret;
207
208 ah_attr->grh.sgid_index = (u8) gid_index;
209 flow_class = be32_to_cpu(grh->version_tclass_flow);
210 ah_attr->grh.flow_label = flow_class & 0xFFFFF;
211 ah_attr->grh.hop_limit = 0xFF;
212 ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
213 }
214 return 0;
215 }
216 EXPORT_SYMBOL(ib_init_ah_from_wc);
217
218 struct ib_ah *ib_create_ah_from_wc(struct ib_pd *pd, struct ib_wc *wc,
219 struct ib_grh *grh, u8 port_num)
220 {
221 struct ib_ah_attr ah_attr;
222 int ret;
223
224 ret = ib_init_ah_from_wc(pd->device, port_num, wc, grh, &ah_attr);
225 if (ret)
226 return ERR_PTR(ret);
227
228 return ib_create_ah(pd, &ah_attr);
229 }
230 EXPORT_SYMBOL(ib_create_ah_from_wc);
231
232 int ib_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
233 {
234 return ah->device->modify_ah ?
235 ah->device->modify_ah(ah, ah_attr) :
236 -ENOSYS;
237 }
238 EXPORT_SYMBOL(ib_modify_ah);
239
240 int ib_query_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
241 {
242 return ah->device->query_ah ?
243 ah->device->query_ah(ah, ah_attr) :
244 -ENOSYS;
245 }
246 EXPORT_SYMBOL(ib_query_ah);
247
248 int ib_destroy_ah(struct ib_ah *ah)
249 {
250 struct ib_pd *pd;
251 int ret;
252
253 pd = ah->pd;
254 ret = ah->device->destroy_ah(ah);
255 if (!ret)
256 atomic_dec(&pd->usecnt);
257
258 return ret;
259 }
260 EXPORT_SYMBOL(ib_destroy_ah);
261
262 /* Shared receive queues */
263
264 struct ib_srq *ib_create_srq(struct ib_pd *pd,
265 struct ib_srq_init_attr *srq_init_attr)
266 {
267 struct ib_srq *srq;
268
269 if (!pd->device->create_srq)
270 return ERR_PTR(-ENOSYS);
271
272 srq = pd->device->create_srq(pd, srq_init_attr, NULL);
273
274 if (!IS_ERR(srq)) {
275 srq->device = pd->device;
276 srq->pd = pd;
277 srq->uobject = NULL;
278 srq->event_handler = srq_init_attr->event_handler;
279 srq->srq_context = srq_init_attr->srq_context;
280 srq->srq_type = srq_init_attr->srq_type;
281 if (srq->srq_type == IB_SRQT_XRC) {
282 srq->ext.xrc.xrcd = srq_init_attr->ext.xrc.xrcd;
283 srq->ext.xrc.cq = srq_init_attr->ext.xrc.cq;
284 atomic_inc(&srq->ext.xrc.xrcd->usecnt);
285 atomic_inc(&srq->ext.xrc.cq->usecnt);
286 }
287 atomic_inc(&pd->usecnt);
288 atomic_set(&srq->usecnt, 0);
289 }
290
291 return srq;
292 }
293 EXPORT_SYMBOL(ib_create_srq);
294
295 int ib_modify_srq(struct ib_srq *srq,
296 struct ib_srq_attr *srq_attr,
297 enum ib_srq_attr_mask srq_attr_mask)
298 {
299 return srq->device->modify_srq ?
300 srq->device->modify_srq(srq, srq_attr, srq_attr_mask, NULL) :
301 -ENOSYS;
302 }
303 EXPORT_SYMBOL(ib_modify_srq);
304
305 int ib_query_srq(struct ib_srq *srq,
306 struct ib_srq_attr *srq_attr)
307 {
308 return srq->device->query_srq ?
309 srq->device->query_srq(srq, srq_attr) : -ENOSYS;
310 }
311 EXPORT_SYMBOL(ib_query_srq);
312
313 int ib_destroy_srq(struct ib_srq *srq)
314 {
315 struct ib_pd *pd;
316 enum ib_srq_type srq_type;
317 struct ib_xrcd *uninitialized_var(xrcd);
318 struct ib_cq *uninitialized_var(cq);
319 int ret;
320
321 if (atomic_read(&srq->usecnt))
322 return -EBUSY;
323
324 pd = srq->pd;
325 srq_type = srq->srq_type;
326 if (srq_type == IB_SRQT_XRC) {
327 xrcd = srq->ext.xrc.xrcd;
328 cq = srq->ext.xrc.cq;
329 }
330
331 ret = srq->device->destroy_srq(srq);
332 if (!ret) {
333 atomic_dec(&pd->usecnt);
334 if (srq_type == IB_SRQT_XRC) {
335 atomic_dec(&xrcd->usecnt);
336 atomic_dec(&cq->usecnt);
337 }
338 }
339
340 return ret;
341 }
342 EXPORT_SYMBOL(ib_destroy_srq);
343
344 /* Queue pairs */
345
346 static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
347 {
348 struct ib_qp *qp = context;
349
350 list_for_each_entry(event->element.qp, &qp->open_list, open_list)
351 event->element.qp->event_handler(event, event->element.qp->qp_context);
352 }
353
354 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
355 {
356 mutex_lock(&xrcd->tgt_qp_mutex);
357 list_add(&qp->xrcd_list, &xrcd->tgt_qp_list);
358 mutex_unlock(&xrcd->tgt_qp_mutex);
359 }
360
361 static struct ib_qp *__ib_open_qp(struct ib_qp *real_qp,
362 void (*event_handler)(struct ib_event *, void *),
363 void *qp_context)
364 {
365 struct ib_qp *qp;
366 unsigned long flags;
367
368 qp = kzalloc(sizeof *qp, GFP_KERNEL);
369 if (!qp)
370 return ERR_PTR(-ENOMEM);
371
372 qp->real_qp = real_qp;
373 atomic_inc(&real_qp->usecnt);
374 qp->device = real_qp->device;
375 qp->event_handler = event_handler;
376 qp->qp_context = qp_context;
377 qp->qp_num = real_qp->qp_num;
378 qp->qp_type = real_qp->qp_type;
379
380 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
381 list_add(&qp->open_list, &real_qp->open_list);
382 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
383
384 return qp;
385 }
386
387 struct ib_qp *ib_open_qp(struct ib_xrcd *xrcd,
388 struct ib_qp_open_attr *qp_open_attr)
389 {
390 struct ib_qp *qp, *real_qp;
391
392 if (qp_open_attr->qp_type != IB_QPT_XRC_TGT)
393 return ERR_PTR(-EINVAL);
394
395 qp = ERR_PTR(-EINVAL);
396 mutex_lock(&xrcd->tgt_qp_mutex);
397 list_for_each_entry(real_qp, &xrcd->tgt_qp_list, xrcd_list) {
398 if (real_qp->qp_num == qp_open_attr->qp_num) {
399 qp = __ib_open_qp(real_qp, qp_open_attr->event_handler,
400 qp_open_attr->qp_context);
401 break;
402 }
403 }
404 mutex_unlock(&xrcd->tgt_qp_mutex);
405 return qp;
406 }
407 EXPORT_SYMBOL(ib_open_qp);
408
409 struct ib_qp *ib_create_qp(struct ib_pd *pd,
410 struct ib_qp_init_attr *qp_init_attr)
411 {
412 struct ib_qp *qp, *real_qp;
413 struct ib_device *device;
414
415 device = pd ? pd->device : qp_init_attr->xrcd->device;
416 qp = device->create_qp(pd, qp_init_attr, NULL);
417
418 if (!IS_ERR(qp)) {
419 qp->device = device;
420 qp->real_qp = qp;
421 qp->uobject = NULL;
422 qp->qp_type = qp_init_attr->qp_type;
423
424 atomic_set(&qp->usecnt, 0);
425 if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) {
426 qp->event_handler = __ib_shared_qp_event_handler;
427 qp->qp_context = qp;
428 qp->pd = NULL;
429 qp->send_cq = qp->recv_cq = NULL;
430 qp->srq = NULL;
431 qp->xrcd = qp_init_attr->xrcd;
432 atomic_inc(&qp_init_attr->xrcd->usecnt);
433 INIT_LIST_HEAD(&qp->open_list);
434
435 real_qp = qp;
436 qp = __ib_open_qp(real_qp, qp_init_attr->event_handler,
437 qp_init_attr->qp_context);
438 if (!IS_ERR(qp))
439 __ib_insert_xrcd_qp(qp_init_attr->xrcd, real_qp);
440 else
441 real_qp->device->destroy_qp(real_qp);
442 } else {
443 qp->event_handler = qp_init_attr->event_handler;
444 qp->qp_context = qp_init_attr->qp_context;
445 if (qp_init_attr->qp_type == IB_QPT_XRC_INI) {
446 qp->recv_cq = NULL;
447 qp->srq = NULL;
448 } else {
449 qp->recv_cq = qp_init_attr->recv_cq;
450 atomic_inc(&qp_init_attr->recv_cq->usecnt);
451 qp->srq = qp_init_attr->srq;
452 if (qp->srq)
453 atomic_inc(&qp_init_attr->srq->usecnt);
454 }
455
456 qp->pd = pd;
457 qp->send_cq = qp_init_attr->send_cq;
458 qp->xrcd = NULL;
459
460 atomic_inc(&pd->usecnt);
461 atomic_inc(&qp_init_attr->send_cq->usecnt);
462 }
463 }
464
465 return qp;
466 }
467 EXPORT_SYMBOL(ib_create_qp);
468
469 static const struct {
470 int valid;
471 enum ib_qp_attr_mask req_param[IB_QPT_MAX];
472 enum ib_qp_attr_mask opt_param[IB_QPT_MAX];
473 } qp_state_table[IB_QPS_ERR + 1][IB_QPS_ERR + 1] = {
474 [IB_QPS_RESET] = {
475 [IB_QPS_RESET] = { .valid = 1 },
476 [IB_QPS_INIT] = {
477 .valid = 1,
478 .req_param = {
479 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
480 IB_QP_PORT |
481 IB_QP_QKEY),
482 [IB_QPT_RAW_PACKET] = IB_QP_PORT,
483 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
484 IB_QP_PORT |
485 IB_QP_ACCESS_FLAGS),
486 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
487 IB_QP_PORT |
488 IB_QP_ACCESS_FLAGS),
489 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
490 IB_QP_PORT |
491 IB_QP_ACCESS_FLAGS),
492 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
493 IB_QP_PORT |
494 IB_QP_ACCESS_FLAGS),
495 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
496 IB_QP_QKEY),
497 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
498 IB_QP_QKEY),
499 }
500 },
501 },
502 [IB_QPS_INIT] = {
503 [IB_QPS_RESET] = { .valid = 1 },
504 [IB_QPS_ERR] = { .valid = 1 },
505 [IB_QPS_INIT] = {
506 .valid = 1,
507 .opt_param = {
508 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
509 IB_QP_PORT |
510 IB_QP_QKEY),
511 [IB_QPT_UC] = (IB_QP_PKEY_INDEX |
512 IB_QP_PORT |
513 IB_QP_ACCESS_FLAGS),
514 [IB_QPT_RC] = (IB_QP_PKEY_INDEX |
515 IB_QP_PORT |
516 IB_QP_ACCESS_FLAGS),
517 [IB_QPT_XRC_INI] = (IB_QP_PKEY_INDEX |
518 IB_QP_PORT |
519 IB_QP_ACCESS_FLAGS),
520 [IB_QPT_XRC_TGT] = (IB_QP_PKEY_INDEX |
521 IB_QP_PORT |
522 IB_QP_ACCESS_FLAGS),
523 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
524 IB_QP_QKEY),
525 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
526 IB_QP_QKEY),
527 }
528 },
529 [IB_QPS_RTR] = {
530 .valid = 1,
531 .req_param = {
532 [IB_QPT_UC] = (IB_QP_AV |
533 IB_QP_PATH_MTU |
534 IB_QP_DEST_QPN |
535 IB_QP_RQ_PSN),
536 [IB_QPT_RC] = (IB_QP_AV |
537 IB_QP_PATH_MTU |
538 IB_QP_DEST_QPN |
539 IB_QP_RQ_PSN |
540 IB_QP_MAX_DEST_RD_ATOMIC |
541 IB_QP_MIN_RNR_TIMER),
542 [IB_QPT_XRC_INI] = (IB_QP_AV |
543 IB_QP_PATH_MTU |
544 IB_QP_DEST_QPN |
545 IB_QP_RQ_PSN),
546 [IB_QPT_XRC_TGT] = (IB_QP_AV |
547 IB_QP_PATH_MTU |
548 IB_QP_DEST_QPN |
549 IB_QP_RQ_PSN |
550 IB_QP_MAX_DEST_RD_ATOMIC |
551 IB_QP_MIN_RNR_TIMER),
552 },
553 .opt_param = {
554 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
555 IB_QP_QKEY),
556 [IB_QPT_UC] = (IB_QP_ALT_PATH |
557 IB_QP_ACCESS_FLAGS |
558 IB_QP_PKEY_INDEX),
559 [IB_QPT_RC] = (IB_QP_ALT_PATH |
560 IB_QP_ACCESS_FLAGS |
561 IB_QP_PKEY_INDEX),
562 [IB_QPT_XRC_INI] = (IB_QP_ALT_PATH |
563 IB_QP_ACCESS_FLAGS |
564 IB_QP_PKEY_INDEX),
565 [IB_QPT_XRC_TGT] = (IB_QP_ALT_PATH |
566 IB_QP_ACCESS_FLAGS |
567 IB_QP_PKEY_INDEX),
568 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
569 IB_QP_QKEY),
570 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
571 IB_QP_QKEY),
572 }
573 }
574 },
575 [IB_QPS_RTR] = {
576 [IB_QPS_RESET] = { .valid = 1 },
577 [IB_QPS_ERR] = { .valid = 1 },
578 [IB_QPS_RTS] = {
579 .valid = 1,
580 .req_param = {
581 [IB_QPT_UD] = IB_QP_SQ_PSN,
582 [IB_QPT_UC] = IB_QP_SQ_PSN,
583 [IB_QPT_RC] = (IB_QP_TIMEOUT |
584 IB_QP_RETRY_CNT |
585 IB_QP_RNR_RETRY |
586 IB_QP_SQ_PSN |
587 IB_QP_MAX_QP_RD_ATOMIC),
588 [IB_QPT_XRC_INI] = (IB_QP_TIMEOUT |
589 IB_QP_RETRY_CNT |
590 IB_QP_RNR_RETRY |
591 IB_QP_SQ_PSN |
592 IB_QP_MAX_QP_RD_ATOMIC),
593 [IB_QPT_XRC_TGT] = (IB_QP_TIMEOUT |
594 IB_QP_SQ_PSN),
595 [IB_QPT_SMI] = IB_QP_SQ_PSN,
596 [IB_QPT_GSI] = IB_QP_SQ_PSN,
597 },
598 .opt_param = {
599 [IB_QPT_UD] = (IB_QP_CUR_STATE |
600 IB_QP_QKEY),
601 [IB_QPT_UC] = (IB_QP_CUR_STATE |
602 IB_QP_ALT_PATH |
603 IB_QP_ACCESS_FLAGS |
604 IB_QP_PATH_MIG_STATE),
605 [IB_QPT_RC] = (IB_QP_CUR_STATE |
606 IB_QP_ALT_PATH |
607 IB_QP_ACCESS_FLAGS |
608 IB_QP_MIN_RNR_TIMER |
609 IB_QP_PATH_MIG_STATE),
610 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
611 IB_QP_ALT_PATH |
612 IB_QP_ACCESS_FLAGS |
613 IB_QP_PATH_MIG_STATE),
614 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
615 IB_QP_ALT_PATH |
616 IB_QP_ACCESS_FLAGS |
617 IB_QP_MIN_RNR_TIMER |
618 IB_QP_PATH_MIG_STATE),
619 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
620 IB_QP_QKEY),
621 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
622 IB_QP_QKEY),
623 }
624 }
625 },
626 [IB_QPS_RTS] = {
627 [IB_QPS_RESET] = { .valid = 1 },
628 [IB_QPS_ERR] = { .valid = 1 },
629 [IB_QPS_RTS] = {
630 .valid = 1,
631 .opt_param = {
632 [IB_QPT_UD] = (IB_QP_CUR_STATE |
633 IB_QP_QKEY),
634 [IB_QPT_UC] = (IB_QP_CUR_STATE |
635 IB_QP_ACCESS_FLAGS |
636 IB_QP_ALT_PATH |
637 IB_QP_PATH_MIG_STATE),
638 [IB_QPT_RC] = (IB_QP_CUR_STATE |
639 IB_QP_ACCESS_FLAGS |
640 IB_QP_ALT_PATH |
641 IB_QP_PATH_MIG_STATE |
642 IB_QP_MIN_RNR_TIMER),
643 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
644 IB_QP_ACCESS_FLAGS |
645 IB_QP_ALT_PATH |
646 IB_QP_PATH_MIG_STATE),
647 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
648 IB_QP_ACCESS_FLAGS |
649 IB_QP_ALT_PATH |
650 IB_QP_PATH_MIG_STATE |
651 IB_QP_MIN_RNR_TIMER),
652 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
653 IB_QP_QKEY),
654 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
655 IB_QP_QKEY),
656 }
657 },
658 [IB_QPS_SQD] = {
659 .valid = 1,
660 .opt_param = {
661 [IB_QPT_UD] = IB_QP_EN_SQD_ASYNC_NOTIFY,
662 [IB_QPT_UC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
663 [IB_QPT_RC] = IB_QP_EN_SQD_ASYNC_NOTIFY,
664 [IB_QPT_XRC_INI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
665 [IB_QPT_XRC_TGT] = IB_QP_EN_SQD_ASYNC_NOTIFY, /* ??? */
666 [IB_QPT_SMI] = IB_QP_EN_SQD_ASYNC_NOTIFY,
667 [IB_QPT_GSI] = IB_QP_EN_SQD_ASYNC_NOTIFY
668 }
669 },
670 },
671 [IB_QPS_SQD] = {
672 [IB_QPS_RESET] = { .valid = 1 },
673 [IB_QPS_ERR] = { .valid = 1 },
674 [IB_QPS_RTS] = {
675 .valid = 1,
676 .opt_param = {
677 [IB_QPT_UD] = (IB_QP_CUR_STATE |
678 IB_QP_QKEY),
679 [IB_QPT_UC] = (IB_QP_CUR_STATE |
680 IB_QP_ALT_PATH |
681 IB_QP_ACCESS_FLAGS |
682 IB_QP_PATH_MIG_STATE),
683 [IB_QPT_RC] = (IB_QP_CUR_STATE |
684 IB_QP_ALT_PATH |
685 IB_QP_ACCESS_FLAGS |
686 IB_QP_MIN_RNR_TIMER |
687 IB_QP_PATH_MIG_STATE),
688 [IB_QPT_XRC_INI] = (IB_QP_CUR_STATE |
689 IB_QP_ALT_PATH |
690 IB_QP_ACCESS_FLAGS |
691 IB_QP_PATH_MIG_STATE),
692 [IB_QPT_XRC_TGT] = (IB_QP_CUR_STATE |
693 IB_QP_ALT_PATH |
694 IB_QP_ACCESS_FLAGS |
695 IB_QP_MIN_RNR_TIMER |
696 IB_QP_PATH_MIG_STATE),
697 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
698 IB_QP_QKEY),
699 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
700 IB_QP_QKEY),
701 }
702 },
703 [IB_QPS_SQD] = {
704 .valid = 1,
705 .opt_param = {
706 [IB_QPT_UD] = (IB_QP_PKEY_INDEX |
707 IB_QP_QKEY),
708 [IB_QPT_UC] = (IB_QP_AV |
709 IB_QP_ALT_PATH |
710 IB_QP_ACCESS_FLAGS |
711 IB_QP_PKEY_INDEX |
712 IB_QP_PATH_MIG_STATE),
713 [IB_QPT_RC] = (IB_QP_PORT |
714 IB_QP_AV |
715 IB_QP_TIMEOUT |
716 IB_QP_RETRY_CNT |
717 IB_QP_RNR_RETRY |
718 IB_QP_MAX_QP_RD_ATOMIC |
719 IB_QP_MAX_DEST_RD_ATOMIC |
720 IB_QP_ALT_PATH |
721 IB_QP_ACCESS_FLAGS |
722 IB_QP_PKEY_INDEX |
723 IB_QP_MIN_RNR_TIMER |
724 IB_QP_PATH_MIG_STATE),
725 [IB_QPT_XRC_INI] = (IB_QP_PORT |
726 IB_QP_AV |
727 IB_QP_TIMEOUT |
728 IB_QP_RETRY_CNT |
729 IB_QP_RNR_RETRY |
730 IB_QP_MAX_QP_RD_ATOMIC |
731 IB_QP_ALT_PATH |
732 IB_QP_ACCESS_FLAGS |
733 IB_QP_PKEY_INDEX |
734 IB_QP_PATH_MIG_STATE),
735 [IB_QPT_XRC_TGT] = (IB_QP_PORT |
736 IB_QP_AV |
737 IB_QP_TIMEOUT |
738 IB_QP_MAX_DEST_RD_ATOMIC |
739 IB_QP_ALT_PATH |
740 IB_QP_ACCESS_FLAGS |
741 IB_QP_PKEY_INDEX |
742 IB_QP_MIN_RNR_TIMER |
743 IB_QP_PATH_MIG_STATE),
744 [IB_QPT_SMI] = (IB_QP_PKEY_INDEX |
745 IB_QP_QKEY),
746 [IB_QPT_GSI] = (IB_QP_PKEY_INDEX |
747 IB_QP_QKEY),
748 }
749 }
750 },
751 [IB_QPS_SQE] = {
752 [IB_QPS_RESET] = { .valid = 1 },
753 [IB_QPS_ERR] = { .valid = 1 },
754 [IB_QPS_RTS] = {
755 .valid = 1,
756 .opt_param = {
757 [IB_QPT_UD] = (IB_QP_CUR_STATE |
758 IB_QP_QKEY),
759 [IB_QPT_UC] = (IB_QP_CUR_STATE |
760 IB_QP_ACCESS_FLAGS),
761 [IB_QPT_SMI] = (IB_QP_CUR_STATE |
762 IB_QP_QKEY),
763 [IB_QPT_GSI] = (IB_QP_CUR_STATE |
764 IB_QP_QKEY),
765 }
766 }
767 },
768 [IB_QPS_ERR] = {
769 [IB_QPS_RESET] = { .valid = 1 },
770 [IB_QPS_ERR] = { .valid = 1 }
771 }
772 };
773
774 int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
775 enum ib_qp_type type, enum ib_qp_attr_mask mask)
776 {
777 enum ib_qp_attr_mask req_param, opt_param;
778
779 if (cur_state < 0 || cur_state > IB_QPS_ERR ||
780 next_state < 0 || next_state > IB_QPS_ERR)
781 return 0;
782
783 if (mask & IB_QP_CUR_STATE &&
784 cur_state != IB_QPS_RTR && cur_state != IB_QPS_RTS &&
785 cur_state != IB_QPS_SQD && cur_state != IB_QPS_SQE)
786 return 0;
787
788 if (!qp_state_table[cur_state][next_state].valid)
789 return 0;
790
791 req_param = qp_state_table[cur_state][next_state].req_param[type];
792 opt_param = qp_state_table[cur_state][next_state].opt_param[type];
793
794 if ((mask & req_param) != req_param)
795 return 0;
796
797 if (mask & ~(req_param | opt_param | IB_QP_STATE))
798 return 0;
799
800 return 1;
801 }
802 EXPORT_SYMBOL(ib_modify_qp_is_ok);
803
804 int ib_modify_qp(struct ib_qp *qp,
805 struct ib_qp_attr *qp_attr,
806 int qp_attr_mask)
807 {
808 return qp->device->modify_qp(qp->real_qp, qp_attr, qp_attr_mask, NULL);
809 }
810 EXPORT_SYMBOL(ib_modify_qp);
811
812 int ib_query_qp(struct ib_qp *qp,
813 struct ib_qp_attr *qp_attr,
814 int qp_attr_mask,
815 struct ib_qp_init_attr *qp_init_attr)
816 {
817 return qp->device->query_qp ?
818 qp->device->query_qp(qp->real_qp, qp_attr, qp_attr_mask, qp_init_attr) :
819 -ENOSYS;
820 }
821 EXPORT_SYMBOL(ib_query_qp);
822
823 int ib_close_qp(struct ib_qp *qp)
824 {
825 struct ib_qp *real_qp;
826 unsigned long flags;
827
828 real_qp = qp->real_qp;
829 if (real_qp == qp)
830 return -EINVAL;
831
832 spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
833 list_del(&qp->open_list);
834 spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
835
836 atomic_dec(&real_qp->usecnt);
837 kfree(qp);
838
839 return 0;
840 }
841 EXPORT_SYMBOL(ib_close_qp);
842
843 static int __ib_destroy_shared_qp(struct ib_qp *qp)
844 {
845 struct ib_xrcd *xrcd;
846 struct ib_qp *real_qp;
847 int ret;
848
849 real_qp = qp->real_qp;
850 xrcd = real_qp->xrcd;
851
852 mutex_lock(&xrcd->tgt_qp_mutex);
853 ib_close_qp(qp);
854 if (atomic_read(&real_qp->usecnt) == 0)
855 list_del(&real_qp->xrcd_list);
856 else
857 real_qp = NULL;
858 mutex_unlock(&xrcd->tgt_qp_mutex);
859
860 if (real_qp) {
861 ret = ib_destroy_qp(real_qp);
862 if (!ret)
863 atomic_dec(&xrcd->usecnt);
864 else
865 __ib_insert_xrcd_qp(xrcd, real_qp);
866 }
867
868 return 0;
869 }
870
871 int ib_destroy_qp(struct ib_qp *qp)
872 {
873 struct ib_pd *pd;
874 struct ib_cq *scq, *rcq;
875 struct ib_srq *srq;
876 int ret;
877
878 if (atomic_read(&qp->usecnt))
879 return -EBUSY;
880
881 if (qp->real_qp != qp)
882 return __ib_destroy_shared_qp(qp);
883
884 pd = qp->pd;
885 scq = qp->send_cq;
886 rcq = qp->recv_cq;
887 srq = qp->srq;
888
889 ret = qp->device->destroy_qp(qp);
890 if (!ret) {
891 if (pd)
892 atomic_dec(&pd->usecnt);
893 if (scq)
894 atomic_dec(&scq->usecnt);
895 if (rcq)
896 atomic_dec(&rcq->usecnt);
897 if (srq)
898 atomic_dec(&srq->usecnt);
899 }
900
901 return ret;
902 }
903 EXPORT_SYMBOL(ib_destroy_qp);
904
905 /* Completion queues */
906
907 struct ib_cq *ib_create_cq(struct ib_device *device,
908 ib_comp_handler comp_handler,
909 void (*event_handler)(struct ib_event *, void *),
910 void *cq_context, int cqe, int comp_vector)
911 {
912 struct ib_cq *cq;
913
914 cq = device->create_cq(device, cqe, comp_vector, NULL, NULL);
915
916 if (!IS_ERR(cq)) {
917 cq->device = device;
918 cq->uobject = NULL;
919 cq->comp_handler = comp_handler;
920 cq->event_handler = event_handler;
921 cq->cq_context = cq_context;
922 atomic_set(&cq->usecnt, 0);
923 }
924
925 return cq;
926 }
927 EXPORT_SYMBOL(ib_create_cq);
928
929 int ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
930 {
931 return cq->device->modify_cq ?
932 cq->device->modify_cq(cq, cq_count, cq_period) : -ENOSYS;
933 }
934 EXPORT_SYMBOL(ib_modify_cq);
935
936 int ib_destroy_cq(struct ib_cq *cq)
937 {
938 if (atomic_read(&cq->usecnt))
939 return -EBUSY;
940
941 return cq->device->destroy_cq(cq);
942 }
943 EXPORT_SYMBOL(ib_destroy_cq);
944
945 int ib_resize_cq(struct ib_cq *cq, int cqe)
946 {
947 return cq->device->resize_cq ?
948 cq->device->resize_cq(cq, cqe, NULL) : -ENOSYS;
949 }
950 EXPORT_SYMBOL(ib_resize_cq);
951
952 /* Memory regions */
953
954 struct ib_mr *ib_get_dma_mr(struct ib_pd *pd, int mr_access_flags)
955 {
956 struct ib_mr *mr;
957
958 mr = pd->device->get_dma_mr(pd, mr_access_flags);
959
960 if (!IS_ERR(mr)) {
961 mr->device = pd->device;
962 mr->pd = pd;
963 mr->uobject = NULL;
964 atomic_inc(&pd->usecnt);
965 atomic_set(&mr->usecnt, 0);
966 }
967
968 return mr;
969 }
970 EXPORT_SYMBOL(ib_get_dma_mr);
971
972 struct ib_mr *ib_reg_phys_mr(struct ib_pd *pd,
973 struct ib_phys_buf *phys_buf_array,
974 int num_phys_buf,
975 int mr_access_flags,
976 u64 *iova_start)
977 {
978 struct ib_mr *mr;
979
980 if (!pd->device->reg_phys_mr)
981 return ERR_PTR(-ENOSYS);
982
983 mr = pd->device->reg_phys_mr(pd, phys_buf_array, num_phys_buf,
984 mr_access_flags, iova_start);
985
986 if (!IS_ERR(mr)) {
987 mr->device = pd->device;
988 mr->pd = pd;
989 mr->uobject = NULL;
990 atomic_inc(&pd->usecnt);
991 atomic_set(&mr->usecnt, 0);
992 }
993
994 return mr;
995 }
996 EXPORT_SYMBOL(ib_reg_phys_mr);
997
998 int ib_rereg_phys_mr(struct ib_mr *mr,
999 int mr_rereg_mask,
1000 struct ib_pd *pd,
1001 struct ib_phys_buf *phys_buf_array,
1002 int num_phys_buf,
1003 int mr_access_flags,
1004 u64 *iova_start)
1005 {
1006 struct ib_pd *old_pd;
1007 int ret;
1008
1009 if (!mr->device->rereg_phys_mr)
1010 return -ENOSYS;
1011
1012 if (atomic_read(&mr->usecnt))
1013 return -EBUSY;
1014
1015 old_pd = mr->pd;
1016
1017 ret = mr->device->rereg_phys_mr(mr, mr_rereg_mask, pd,
1018 phys_buf_array, num_phys_buf,
1019 mr_access_flags, iova_start);
1020
1021 if (!ret && (mr_rereg_mask & IB_MR_REREG_PD)) {
1022 atomic_dec(&old_pd->usecnt);
1023 atomic_inc(&pd->usecnt);
1024 }
1025
1026 return ret;
1027 }
1028 EXPORT_SYMBOL(ib_rereg_phys_mr);
1029
1030 int ib_query_mr(struct ib_mr *mr, struct ib_mr_attr *mr_attr)
1031 {
1032 return mr->device->query_mr ?
1033 mr->device->query_mr(mr, mr_attr) : -ENOSYS;
1034 }
1035 EXPORT_SYMBOL(ib_query_mr);
1036
1037 int ib_dereg_mr(struct ib_mr *mr)
1038 {
1039 struct ib_pd *pd;
1040 int ret;
1041
1042 if (atomic_read(&mr->usecnt))
1043 return -EBUSY;
1044
1045 pd = mr->pd;
1046 ret = mr->device->dereg_mr(mr);
1047 if (!ret)
1048 atomic_dec(&pd->usecnt);
1049
1050 return ret;
1051 }
1052 EXPORT_SYMBOL(ib_dereg_mr);
1053
1054 struct ib_mr *ib_alloc_fast_reg_mr(struct ib_pd *pd, int max_page_list_len)
1055 {
1056 struct ib_mr *mr;
1057
1058 if (!pd->device->alloc_fast_reg_mr)
1059 return ERR_PTR(-ENOSYS);
1060
1061 mr = pd->device->alloc_fast_reg_mr(pd, max_page_list_len);
1062
1063 if (!IS_ERR(mr)) {
1064 mr->device = pd->device;
1065 mr->pd = pd;
1066 mr->uobject = NULL;
1067 atomic_inc(&pd->usecnt);
1068 atomic_set(&mr->usecnt, 0);
1069 }
1070
1071 return mr;
1072 }
1073 EXPORT_SYMBOL(ib_alloc_fast_reg_mr);
1074
1075 struct ib_fast_reg_page_list *ib_alloc_fast_reg_page_list(struct ib_device *device,
1076 int max_page_list_len)
1077 {
1078 struct ib_fast_reg_page_list *page_list;
1079
1080 if (!device->alloc_fast_reg_page_list)
1081 return ERR_PTR(-ENOSYS);
1082
1083 page_list = device->alloc_fast_reg_page_list(device, max_page_list_len);
1084
1085 if (!IS_ERR(page_list)) {
1086 page_list->device = device;
1087 page_list->max_page_list_len = max_page_list_len;
1088 }
1089
1090 return page_list;
1091 }
1092 EXPORT_SYMBOL(ib_alloc_fast_reg_page_list);
1093
1094 void ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
1095 {
1096 page_list->device->free_fast_reg_page_list(page_list);
1097 }
1098 EXPORT_SYMBOL(ib_free_fast_reg_page_list);
1099
1100 /* Memory windows */
1101
1102 struct ib_mw *ib_alloc_mw(struct ib_pd *pd)
1103 {
1104 struct ib_mw *mw;
1105
1106 if (!pd->device->alloc_mw)
1107 return ERR_PTR(-ENOSYS);
1108
1109 mw = pd->device->alloc_mw(pd);
1110 if (!IS_ERR(mw)) {
1111 mw->device = pd->device;
1112 mw->pd = pd;
1113 mw->uobject = NULL;
1114 atomic_inc(&pd->usecnt);
1115 }
1116
1117 return mw;
1118 }
1119 EXPORT_SYMBOL(ib_alloc_mw);
1120
1121 int ib_dealloc_mw(struct ib_mw *mw)
1122 {
1123 struct ib_pd *pd;
1124 int ret;
1125
1126 pd = mw->pd;
1127 ret = mw->device->dealloc_mw(mw);
1128 if (!ret)
1129 atomic_dec(&pd->usecnt);
1130
1131 return ret;
1132 }
1133 EXPORT_SYMBOL(ib_dealloc_mw);
1134
1135 /* "Fast" memory regions */
1136
1137 struct ib_fmr *ib_alloc_fmr(struct ib_pd *pd,
1138 int mr_access_flags,
1139 struct ib_fmr_attr *fmr_attr)
1140 {
1141 struct ib_fmr *fmr;
1142
1143 if (!pd->device->alloc_fmr)
1144 return ERR_PTR(-ENOSYS);
1145
1146 fmr = pd->device->alloc_fmr(pd, mr_access_flags, fmr_attr);
1147 if (!IS_ERR(fmr)) {
1148 fmr->device = pd->device;
1149 fmr->pd = pd;
1150 atomic_inc(&pd->usecnt);
1151 }
1152
1153 return fmr;
1154 }
1155 EXPORT_SYMBOL(ib_alloc_fmr);
1156
1157 int ib_unmap_fmr(struct list_head *fmr_list)
1158 {
1159 struct ib_fmr *fmr;
1160
1161 if (list_empty(fmr_list))
1162 return 0;
1163
1164 fmr = list_entry(fmr_list->next, struct ib_fmr, list);
1165 return fmr->device->unmap_fmr(fmr_list);
1166 }
1167 EXPORT_SYMBOL(ib_unmap_fmr);
1168
1169 int ib_dealloc_fmr(struct ib_fmr *fmr)
1170 {
1171 struct ib_pd *pd;
1172 int ret;
1173
1174 pd = fmr->pd;
1175 ret = fmr->device->dealloc_fmr(fmr);
1176 if (!ret)
1177 atomic_dec(&pd->usecnt);
1178
1179 return ret;
1180 }
1181 EXPORT_SYMBOL(ib_dealloc_fmr);
1182
1183 /* Multicast groups */
1184
1185 int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1186 {
1187 int ret;
1188
1189 if (!qp->device->attach_mcast)
1190 return -ENOSYS;
1191 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1192 return -EINVAL;
1193
1194 ret = qp->device->attach_mcast(qp, gid, lid);
1195 if (!ret)
1196 atomic_inc(&qp->usecnt);
1197 return ret;
1198 }
1199 EXPORT_SYMBOL(ib_attach_mcast);
1200
1201 int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
1202 {
1203 int ret;
1204
1205 if (!qp->device->detach_mcast)
1206 return -ENOSYS;
1207 if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
1208 return -EINVAL;
1209
1210 ret = qp->device->detach_mcast(qp, gid, lid);
1211 if (!ret)
1212 atomic_dec(&qp->usecnt);
1213 return ret;
1214 }
1215 EXPORT_SYMBOL(ib_detach_mcast);
1216
1217 struct ib_xrcd *ib_alloc_xrcd(struct ib_device *device)
1218 {
1219 struct ib_xrcd *xrcd;
1220
1221 if (!device->alloc_xrcd)
1222 return ERR_PTR(-ENOSYS);
1223
1224 xrcd = device->alloc_xrcd(device, NULL, NULL);
1225 if (!IS_ERR(xrcd)) {
1226 xrcd->device = device;
1227 xrcd->inode = NULL;
1228 atomic_set(&xrcd->usecnt, 0);
1229 mutex_init(&xrcd->tgt_qp_mutex);
1230 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
1231 }
1232
1233 return xrcd;
1234 }
1235 EXPORT_SYMBOL(ib_alloc_xrcd);
1236
1237 int ib_dealloc_xrcd(struct ib_xrcd *xrcd)
1238 {
1239 struct ib_qp *qp;
1240 int ret;
1241
1242 if (atomic_read(&xrcd->usecnt))
1243 return -EBUSY;
1244
1245 while (!list_empty(&xrcd->tgt_qp_list)) {
1246 qp = list_entry(xrcd->tgt_qp_list.next, struct ib_qp, xrcd_list);
1247 ret = ib_destroy_qp(qp);
1248 if (ret)
1249 return ret;
1250 }
1251
1252 return xrcd->device->dealloc_xrcd(xrcd);
1253 }
1254 EXPORT_SYMBOL(ib_dealloc_xrcd);
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